Mineral processing process for recovering copper from copper smelting slag through flotation

Abstract

The invention discloses a mineral processing process for classifying recovery of copper from copper smelting slag. The mineral processing process adopts an ore grinding-grading-classifying separation process; a two-stage and one closed circuit grinding flow composed of a ball grinding mill, a rod mill and a hydrocyclone is used for the ore grinding of the copper smelting slag, and the occupancy of grinding products with granularity -0.044 mm is 80-90%; the grinding products are graded into +0.020 mm coarse products and -0.020 mm fine products by a high-frequency vibrating fine screen, the +0.020 mm coarse products are processed into copper concentrate I and gangue I through one-time roughing, one-time concentrating and twice scavenging flotation processes, and the -0.020 mm fine products are processed into copper concentrate II and gangue II through one-time roughing, twice concentrating and twice scavenging flotation processes. The flotation condition pertinence is improved, the reagent cost and energy consumption cost are lowered, and the purpose of effectively recovering the copper from the copper smelting slag is achieved.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a mineral processing process for copper smelting slag classification and recovery of copper. Background technique [0002] With the development of my country's copper smelting industry, copper smelting slag is increasing year by year. By 2012, the output of copper smelting slag in my country will be about 1.1×10 4 kt·copper smelting slag / a, based on 0.8% copper content, the copper content of these slags is equivalent to the output of several large copper mines. Therefore, the effective recovery of copper in copper smelting slag can not only alleviate the shortage of copper resources in my country to a certain extent, but also reduce the environmental hazards of slag stockpiling. [0003] In recent years, some progress has been made in the research on copper recovery by flotation of copper smelting slag. The published patent documents include: [0004] a. Copper rec...

AI Technical Summary

Problems solved by technology

The existing flotation technology has the problems of mutual interference between the coarse-grained grade and the fine-grained grade during the flotation process, and the mismatch of optimal flotation conditions such as reagent system, flotation time, pulp concentration, and aeration volume. The loss in the mine is relatively large, and the recovery index is not ideal. According to statistics, the copper grade of flotation tailings of copper smelting slag in my country is about 0.35%, which is equivalent to the grade of raw ore produced by some domestic copper mines, and the waste of resources is serious.

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